The document is a presentation by an engineer about their job. It describes what engineers do, such as applying math and science to solve problems and build machines like airplanes, cars, and computer systems. It discusses how engineers have accomplished feats like the Great Pyramids, airplanes, and putting a man on the moon. The engineer specifically builds "the cloud", which is a network of servers that provide data storage and online services. They enjoy creative problem solving and working with other smart people.